Fish species reasonable collocation method
2018-06-14 16:01:27
In recent years, the price of freshwater fish has been relatively low, and fish farmers have had little benefit. A few contracted households have seen the phenomenon of returning fishes to the fields and filling up ponds. In fact, the solution to the difficulties can be found in fish ponds. That is to increase the output. The fish ponds with a per mu yield of less than a kilogram will be adjusted to a heavy load, or even more than a pound, and the benefits will come out. To achieve this goal, it is necessary to properly coordinate the stocking of fish species, change the original unscientific mix proportion, and decide according to pond conditions, feed and fertilizer sources and management levels.
First, the scientific proportion of eating fish and fertilizer fish
In the case of grass carp, there are fish ponds fed with green feed and fertilizer, and the ratio of eating fish to fish is 2:1 to 3:2; the proportion of fish ponds mainly composed of concentrated feeds, green feed and fertilizers may not be affected. This indicator is limited. For example, in the Shanghai area (including Jiangsu and Zhejiang), the proportion of 1 grass (fish) with 3 é²¢ (white pheasants) has been used in the past. This can only be applied to the adequate supply of fertilizers, and for fertilizers, there are enough plankton. If the source of fertilizer is small, relying only on the fecal weight of water excreted by grass carp, it is not possible to bring 3 grasses to the grass and only 2 or 1 shit. Even with 1 or 2 grass or 3 grass, otherwise the output will fail.
Second, a reasonable ratio between fertilizer and fish
The proportion of white leeks and flower pods cultured in ponds is generally controlled to be 3 to 5:1. However, after individual contracting 1 to 2 ponds and more than 10 acres, the actual growth of white pods should be used to make decisions. If the white storks reach 1.5 kg (750 g) or more at the end of the year, and the scapes reach 2 kg (1000 g) or more, they can continue to match with 3 to 5:1; if the pelicans grow very small, they are about 500 g. , And flower buds in more than 1000 grams, which requires adjustment of the ratio, can be 2:1 or even 1:1. The quality of individual fishponds can be reversed if the zooplankton grows vigorously and it is beneficial to the growth of the calyx. That is more than white pods. Some newcomers to fish often only follow the traditional method and ignore the practical experience of the tips, and thus affect the yield.
Third, the key proportion of the same variety of different specifications
This proportion is mainly determined by the specifications of the fish species that need to be stocked in the second year of raising. If rounding is carried out, it must be determined based on the number of stages of fishing. For example, the first large-scale species of grass carp fish should account for 70% to 75% of the total grass species, and the second grade of old species of fish should account for 20% to 25%; Mouth species should be 5% to 10%. If we do not match this with a reasonable proportion, we will disrupt the production plan, and it will only work for the production of the current year, and it will show no effect in the second year. Often, some contracting households have caused this critical imbalance due to the inability of fish species to settle, resulting in low yields and poor returns. This also requires that the contracting time should not be short-term, and that it will take more than three or five years (or 10 years) for each year to solve the issue of fish-breeding on a yearly basis and increase production and efficiency.
Fourth, the optimal density of reasonable stocking
Mastering the first three points still cannot achieve high yields, and we must also pay attention to density. The stocking density also depends on pond conditions and the feed supply of fertilizers. Under normal circumstances, the net yield of a mu of water with a depth of 1 meter can reach 200-300 kilograms; the water depth of 2 meters can reach 500 kilograms; with a depth of 3 meters, it can reach 800 kilograms. However, if it is more than 3 meters, it will adversely affect the growth of fish. If the management level is low, the conditions for water intake and drainage are poor, and the supply of feed and fertilizer cannot be met, the output will be affected and the stocking density will also be reduced. Practical experience: 50 kg of dry grass (including artificially cultivated Sudan grass and ryegrass, etc.) can be stocked with 500 grams of grass carp carp species; 4000 grams to 5000 grams of pelleted feed or dish can be stocked with 500 grams of eaten fish species. As for the stocking density of fertilizers, emphasis should be placed on determining the proportion based on the amount of fertilizer and the amount of feed to the fish. At the same time, the plankton quality and replenishment rate must be considered in the pond itself. Normally, 50% to 70% of the net fish-eating plan may be stocked, or 2 to 4 tailed fish may be stocked in accordance with 100 kg of feeding and fertilizing material.
In addition, due to the different types of fish, their stocking specifications, growth rates, and size of developed commercial fish are different, and stocking densities must also be different. The same applies to fish of different specifications in the same variety. In addition, the stock density of the bottom fish-based ponds can be denser, and that of the upper-layer fishes should be thinner. However, density and leanness are relative and can be adjusted. For example, a fishpond was originally stocked too densely, and later it was adjusted to increase the amount of feeding and fertilizing, so that the original amount of stocking was relatively insignificant. Therefore, as long as the contracted households are not short-term behavior, adjusting the stocking rate once a year in the stocking season will surely achieve the purpose of high yield and high efficiency.
First, the scientific proportion of eating fish and fertilizer fish
In the case of grass carp, there are fish ponds fed with green feed and fertilizer, and the ratio of eating fish to fish is 2:1 to 3:2; the proportion of fish ponds mainly composed of concentrated feeds, green feed and fertilizers may not be affected. This indicator is limited. For example, in the Shanghai area (including Jiangsu and Zhejiang), the proportion of 1 grass (fish) with 3 é²¢ (white pheasants) has been used in the past. This can only be applied to the adequate supply of fertilizers, and for fertilizers, there are enough plankton. If the source of fertilizer is small, relying only on the fecal weight of water excreted by grass carp, it is not possible to bring 3 grasses to the grass and only 2 or 1 shit. Even with 1 or 2 grass or 3 grass, otherwise the output will fail.
Second, a reasonable ratio between fertilizer and fish
The proportion of white leeks and flower pods cultured in ponds is generally controlled to be 3 to 5:1. However, after individual contracting 1 to 2 ponds and more than 10 acres, the actual growth of white pods should be used to make decisions. If the white storks reach 1.5 kg (750 g) or more at the end of the year, and the scapes reach 2 kg (1000 g) or more, they can continue to match with 3 to 5:1; if the pelicans grow very small, they are about 500 g. , And flower buds in more than 1000 grams, which requires adjustment of the ratio, can be 2:1 or even 1:1. The quality of individual fishponds can be reversed if the zooplankton grows vigorously and it is beneficial to the growth of the calyx. That is more than white pods. Some newcomers to fish often only follow the traditional method and ignore the practical experience of the tips, and thus affect the yield.
Third, the key proportion of the same variety of different specifications
This proportion is mainly determined by the specifications of the fish species that need to be stocked in the second year of raising. If rounding is carried out, it must be determined based on the number of stages of fishing. For example, the first large-scale species of grass carp fish should account for 70% to 75% of the total grass species, and the second grade of old species of fish should account for 20% to 25%; Mouth species should be 5% to 10%. If we do not match this with a reasonable proportion, we will disrupt the production plan, and it will only work for the production of the current year, and it will show no effect in the second year. Often, some contracting households have caused this critical imbalance due to the inability of fish species to settle, resulting in low yields and poor returns. This also requires that the contracting time should not be short-term, and that it will take more than three or five years (or 10 years) for each year to solve the issue of fish-breeding on a yearly basis and increase production and efficiency.
Fourth, the optimal density of reasonable stocking
Mastering the first three points still cannot achieve high yields, and we must also pay attention to density. The stocking density also depends on pond conditions and the feed supply of fertilizers. Under normal circumstances, the net yield of a mu of water with a depth of 1 meter can reach 200-300 kilograms; the water depth of 2 meters can reach 500 kilograms; with a depth of 3 meters, it can reach 800 kilograms. However, if it is more than 3 meters, it will adversely affect the growth of fish. If the management level is low, the conditions for water intake and drainage are poor, and the supply of feed and fertilizer cannot be met, the output will be affected and the stocking density will also be reduced. Practical experience: 50 kg of dry grass (including artificially cultivated Sudan grass and ryegrass, etc.) can be stocked with 500 grams of grass carp carp species; 4000 grams to 5000 grams of pelleted feed or dish can be stocked with 500 grams of eaten fish species. As for the stocking density of fertilizers, emphasis should be placed on determining the proportion based on the amount of fertilizer and the amount of feed to the fish. At the same time, the plankton quality and replenishment rate must be considered in the pond itself. Normally, 50% to 70% of the net fish-eating plan may be stocked, or 2 to 4 tailed fish may be stocked in accordance with 100 kg of feeding and fertilizing material.
In addition, due to the different types of fish, their stocking specifications, growth rates, and size of developed commercial fish are different, and stocking densities must also be different. The same applies to fish of different specifications in the same variety. In addition, the stock density of the bottom fish-based ponds can be denser, and that of the upper-layer fishes should be thinner. However, density and leanness are relative and can be adjusted. For example, a fishpond was originally stocked too densely, and later it was adjusted to increase the amount of feeding and fertilizing, so that the original amount of stocking was relatively insignificant. Therefore, as long as the contracted households are not short-term behavior, adjusting the stocking rate once a year in the stocking season will surely achieve the purpose of high yield and high efficiency.
Pure Dried Onion powder,High Quality Pure Dried Onion powder,Pure Dried Onion powder Details, EARTH EXPO COMPANY
Weifang Wangyuan Food Co., Ltd , http://www.wangyuanfoods.com